Berend dethlefsen and bandick feddersen



No. 6I6',775. Patented Dec. 27, i898.

B. DETHLEFSEN &. B. FEDDERSEN.

L OCK FR CYCLES.

(Application tiled Apr. 2l, 1898,)

(No Model.)

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UNITED STATES PATENT TFTCE.

BEREND Dn'ruLEFsnN AND BANDIoK FEDDERsEN, or HAMBURG, GERMANY.

LOCK FOR CYCLES.

.SPECIFICATION forming part of Letters Patent No. 616,77 5, datedDecember 27 189,8.

Application filed April 21, 1898.

To all whom it may concern.-

Beit known that we, BEREND DETHLEFSEN and BANDICK FEDDERSEN, citizens ofGermany, residing at Hamburg, in the Empire of' Germany, have inventedcertain new and useful Improvements in Locks for Cycles, of which thefollowing is a specification.

The lock forming the subject of this invention is intended for lockingthe handle-bar or the front-fork pillar of cycles in a fixed position tothe frame. 'Y v The principal characteristics of the lock ar that it canbe pushed from the back, for instance, through the elbow-bracket for thesaddle-post into one of the tubes forming the frame of the cycle and befixed in the desired position by so arranging the turnable keypin thatit can move in its axial direction under spring action and spring intothe keyhole formed in the tube. The key-pin is arranged on one side,preferably so far vertically above the center line of the tube that itsunder side touches the geometrical center line of the tube, by whicharrangement the tube is least weakened. This arrangement of fixing thelock has the advantage that it can very easily and quickly be removedagain from the tube to the back for eventual repairs, which aresometimes necessary with such small safety-locks.

Figure l of the accompanying drawings is a vertical longitudinal sectionof the lock; and Fig. 2, a top view of the lock, showing the same in thehorizontally-sectioned tube.

The lock shown on the drawings has at each end, back, and front a plate1.', which fits closely into the tube w. The front platee' is placed atan incline, so as to fit against the inclined front tube of the frame.Two fixed lock-case plates y are attached to the plates i, and betweenthe plates y the tumblers e and bolt a are placed, said tumblers beingacted upon by springs 7s, as shown, -to normally hold them depressed.

g is the proper key-pin, which can slide longitudinally in the twoplates y. The front plate y has a fixed guide-boss .2', intended to giveadditional support to the key-pin g'. The key-pin rests with its head sagainst a strong spring f, which always has a tendency to push it outthrough an opening 5c in the Serial No. 678,391. (No model.)

tubular member w into the position shown on Fig. 2. The tumblers e arehinged upon the fixed pin d. Aprojection or stud 71 fixed on the bolt,engages into the notches g of the tumbler-s. The back end of the bolt aris guided on a peg or stud a', fixed to one of the plates y andengaging into a slot b of the bolt. The front end of the bolt isguided-in the front plate 1l.

When shuttingY the lock, the bit of the key inserted into the slot r ofthe key-pin engages into the notch b of the bolt a and pushes itforward, while at the same time lifting the tumblers, so that the boltenters into a hole d in the front-fork pillar or the vertical tube ofthe handle-bar. When the shutting of the lock is completed, the tumblersin the usual way seize over the stud h, andthereby lock the bolt. Y Thebolt a is provided with a longitudinal slot or opening e', through whichthe key pin g' passes, whereby said bolt is free to move longitudinally.

If the lock has to be removed from the tube of the frame for repairs, astiff rod is screwed into a tapped hole provided in the back plate t',and after the pin g has been pushed back against the pressure of springf the whole lock is drawn back by means of the said rod. lt is usuallysufficient to render the lock virtually immovable in the tube bythe'friction of the plates i or of a circular lock-case connectingthese. However, a part not recognizable internally or not removable fromthe outside may be added in or at the tube, which assures the positionof the lock with certainty.

In order to place the lock mechanism in position within the tubularmember and to retain the sametherein, it is simply necessary to insertthe same in the said tubular member from an opening in the rear, asheretofore described, and to then force the same forward until thespring-actuated key-pin g/ snaps into the side opening :c in the saidtubular member, which will hold the lock mechanism in position andretain the same against a longitudinal and rotary movement until it isdesired to remove the lock mechanism, which is accomplished by forcingback the key-pin g until it clears the opening whereby the mechanismwill be free to be drawn out of the tubular member from the rear, asheretofore explained.

What We claim, and desire to secure by Letters Patent of the UnitedStates, is-V l. In combination with a tubular member having a sideopening therein, a lock mechanism removably located Within said tubularmember and having a laterally-movable key-pin, said pin being arrangedto enter the opening in the tubular member when the lock mechanism isinserted therein,- substantially as and for the purpose specified.

2. In combination with a tubular member having a side opening therein, alock mechanism removably located Within said tubular member and carryinga laterally-movable spring-actuated key-pin, said pin being arranged toenter the opening in the tubular member When the lock mechanism isinserted therein, substantially as described.

3. In a lock for cycles, the combination with a fixed tubular memberhaving a keyhole-opening in one side thereof, of a movable l memberadapted to be locked to said fixed member, a lock mechanism removablylocated Within said tubular member, a laterallymovable spring-actuatedkey-pin carried by the lock mechanism and adapted to snap into thekeyhole-opening in the tubular member when the'locli mechanism is placedYin position therein and a locking-bolt arranged to engage the saidmovable member, substantially as described.

4. In a lock for cycles, the combination with a fixed tubular memberhaving a keyhole-opening in one side thereof, of a movable memberadapted to be locked to said fixed member, a lock mechanism removably1ocated within said tubular member and comprising end plates z',longitudinal plates y, attached to said end plates, tumblers pivoted tosaid longitudinal plates, a laterally-movable key-pin carried by ,thesaid latter-named plates and adapted toenter the keyhole-opening in thesaid tubular member, a spring normally acting upon one end of saidkey-pin to lforce the same outward, and a locking-bolt arranged toengage the said movable member, substantially as described.

BEREND DETHLEFSEN. BANDICK FEDDERSEN.

Witnesses:

GUsrAv WEBER, E. H. L. MUMNENHOFF.

